<script setup lang="ts">
import { ListFormat } from 'typescript'
import { computed, ref, watch } from 'vue'

// 定义水果对象的类型
interface Fruit {
  id: number
  icon: string
  isChecked: boolean
  num: number
  price: number
}
// 存储list
const listKey = 'list'
const res = localStorage.getItem(listKey)
// 设置初始值
let listAll: Fruit[] = []
if (res === null) {
  listAll = [
    {
      id: 1,
      icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/ll.png',
      isChecked: true,
      num: 2,
      price: 6,
    },
    {
      id: 2,
      icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/smt.png',
      isChecked: false,
      num: 7,
      price: 20,
    },
    {
      id: 3,
      icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/tg.png',
      isChecked: false,
      num: 3,
      price: 40,
    },
    {
      id: 4,
      icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/xg.png',
      isChecked: false,
      num: 10,
      price: 3,
    },
    {
      id: 5,
      icon: 'https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/yl.png',
      isChecked: false,
      num: 20,
      price: 34,
    },
  ]
} else {
  listAll = JSON.parse(res)
}
// 水果列表
const fruitList = ref<Fruit[]>(listAll)

//监听
watch(
  fruitList,
  () => {
    localStorage.setItem(listKey, JSON.stringify(fruitList.value))
  },
  {
    deep: true,
  },
)

// 删除元素
const del = (id: number) => {
  // console.log(id)
  const list = fruitList.value.filter((item) => {
    return id !== item.id
  })
  fruitList.value = list
}

// 累加
const increase = (item: Fruit) => {
  item.num++
}

// 累减
const decrease = (item: Fruit) => {
  if (item.num <= 1) {
    return
  }
  item.num--
}

// const theVealue = ref(false)
// 全选
const cheackAll = computed({
  get: () => {
    const res = fruitList.value.every((item) => item.isChecked == true)
    console.log(res)
    return res
  },
  set: (value) => {
    fruitList.value.forEach((item) => (item.isChecked = value))
  },
})

// 计算总数
const countAll = computed(() => {
  const res = fruitList.value.filter((item) => {
    return item.isChecked
  })
  return res.reduce((pre, item) => {
    return pre + item.num
  }, 0)
})

// 计算总价
const priceAll = computed(() => {
  const res = fruitList.value.filter((item) => {
    return item.isChecked
  })
  return res.reduce((pre, item) => {
    return pre + item.num * item.price
  }, 0)
})
</script>

<template>
  <div class="app-container" id="app">
    <!-- 顶部banner -->
    <div class="banner-box">
      <img src="https://hongm-1312445828.cos.ap-nanjing.myqcloud.com/sg_top.png" alt="" />
    </div>
    <!-- 面包屑 -->
    <div class="breadcrumb">
      <span>🏠</span>
      /
      <span>购物车</span>
    </div>
    <!-- 购物车主体 -->
    <div class="main">
      <div class="table">
        <!-- 头部 -->
        <div class="thead">
          <div class="tr">
            <div class="th">选中</div>
            <div class="th th-pic">图片</div>
            <div class="th">单价</div>
            <div class="th num-th">个数</div>
            <div class="th">小计</div>
            <div class="th">操作</div>
          </div>
        </div>
        <!-- 身体 -->
        <div class="tbody">
          <div class="tr active" v-for="item in fruitList" :key="item.id">
            <div class="td">
              <input
                type="checkbox"
                checked
                v-model="item.isChecked"
                @click="item.isChecked = !item.isChecked"
              />
            </div>
            <div class="td">
              <img :src="item.icon" alt="" />
            </div>
            <div class="td">{{ item.price }}</div>
            <div class="td">
              <div class="my-input-number">
                <button class="decrease" @click="decrease(item)">-</button>
                <span class="my-input__inner">{{ item.num }}</span>
                <button class="increase" @click="increase(item)">+</button>
              </div>
            </div>
            <div class="td">{{ item.num * item.price }}</div>
            <div class="td"><button @click="del(item.id)">删除</button></div>
          </div>
        </div>
      </div>
      <!-- 底部 -->
      <div class="bottom">
        <!-- 全选 -->
        <label class="check-all">
          <input type="checkbox" v-model="cheackAll" />
          全选
        </label>
        <div class="right-box">
          <!-- 所有商品总价 -->
          <span class="price-box"
            >总价&nbsp;&nbsp;:&nbsp;&nbsp;¥&nbsp;<span class="price">{{ priceAll }}</span></span
          >
          <!-- 结算按钮 -->
          <button class="pay">结算( {{ countAll }} )</button>
        </div>
      </div>
    </div>
    <!-- 空车 -->
    <div class="empty">🛒空空如也</div>
  </div>
</template>

<style scoped>
@import './style/inputnumber.css';
@import './style/index.css';
</style>
